Muhammad Ali: Michael Parkinson pays tribute

Sir Michael Parkinson, who hosted Muhammad Ali on his chat show four times during his career, says "the greatest fighter of them all was brought down because of the fight that he so loved".

The former world heavyweight boxing champion, one of the world's best-known sportsmen, died at a hospital in the US city of Phoenix, Arizona, after being admitted on Thursday.

He was suffering from a respiratory illness, a condition that was complicated by Parkinson's disease.

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